Working substance for producing heat transforming effects



' Hence,

Patented Aug, 11, 1931 l,818,ll7

.. more s ars PATENT oFrics E Drawing.

This invention relates to compositions of matter adapted for use industrially with particular relation to heat transforming systems, es cially mechanically operated red frigerating outfits intended for domestic use. For outfits of the last named type it is es ecially desirable, if not imperative, that t io composition of matter chosen as the worhng substance be of a harmless nature 10 in order that the lives and health of householders may not be endangered in the event that the apparatus becomes defective.

v the purpose of the invention is to T provide a non-explosive, non-aable, and non-corrosive composition of matter having suficient volatility to adapt it foruse as a refrigerant in heat-transforming sys flaable.

terns. a In order to secure the required degree of go volatility which will make m improved composition of matter suitable ar refrigeration purposes generally, and domestic refrigeration in particular to combine or to provide a solution of at least two ingredients or components. The selection is such that undesirable characteristics or properties of one com onent are overcome or neutralized by anot er compo-' nent. In the present instance the factor of safety is of prime consideration in the selection of the major indient which must be suficiently volatile to be p actical but whose undesirable properties or such as to be capable of bein neutralizedfwithout impairmithe $1 11 of the composition as a re iger t By preference theingredients are tn from relatedhalo enated hydrocarbonoups such as thee orinated ethyl and c orinated meth l derivatives. 'Dichloroeth mmable have been found to be very satisfactory as the major edients and with them. is combined a related halnated hydrocarbon' higher in halo on content, such as carboh tetrachloride. C14). The com= bination of these ingredients results in a non-able liquid. I d that about I 675-b t carbon tetrachloride is cient to 1' i." '11: :ble

render the composition non- H W. DAVENPOR'LOE DMBQIT, MIGHIGAII, ASSIGNOB '.|.O CHICAGO P TOOL com, 01: YORK, ELY}, A (303203532108 0] m 1, 1:1;

above 1 d it desirable.

' lone ((3% l and eth lidene chloride fi CHC which are slig tly-in an sunsranon ran some mum rmsromnre armors Application filed Febmay 8, 1M7. Serial No. 170,487.

' thou h more maybe without raising the i1in% point of the composition far which is the normal figure for eth lidene chloride.

claim as my invention:

1. A non-flammable volatile liquid having a boiling oint below 0. comprising an infiamni'ab e halgenated hydrocarbon togather with a s cient quantity of a related halogenated hydrocarbon of higher halo on content to render the composition nonable.

2. A li aid for use as a refrigerant having a boiling point below 65 0. containing dichloroethylene and havi a non-flammable halogenated hydrocar n in solution in suificient amount to render the liquid nonof matter adapted for use as a refrigerant medium compr sing dibon tetrachloride.

Signed by me at Wayne, and State of Michigan, this 14th day of Febrfia 1927.

RAN OM W. DAVENPORT.

chloroethylene and about 6 per cent of car- I Detroit, in the county of v 

